Raman spectroscopic and microscopic analysis for monitoring renal osteodystrophy signatures

John D. Ciubuc, Marian Manciu, Avudaiappan Maran, Michael J. Yaszemski, Emma M. Sundin, Kevin E. Bennet, Felicia S. Manciu

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Defining the pathogenesis of renal osteodystrophy (ROD) and its treatment efficacy are difficult, since many factors potentially affect bone quality. In this study, confocal Raman microscopy and parallel statistical analysis were used to identify differences in bone composition between healthy and ROD bone tissues through direct visualization of three main compositional parametric ratios, namely, calcium content, mineral-to-matrix, and carbonate-to-matrix. Besides the substantially lower values found in ROD specimens for these representative ratios, an obvious accumulation of phenylalanine is Raman spectroscopically observed for the first time in ROD samples and reported here. Thus, elevated phenylalanine could also be considered as an indicator of the disease. Since the image results are based on tens of thousands of spectra per sample, not only are the average ratios statistically significantly different for normal and ROD bone, but the method is clearly powerful in distinguishing between the two types of samples. Furthermore, the statistical outcomes demonstrate that only a relatively small number of spectra need to be recorded in order to classify the samples. This work thus opens the possibility of future development of in vivo Raman sensors for assessment of bone structure, remodeling, and mineralization, where different biomarkers are simultaneously detected with unprecedented accuracy.

Original languageEnglish (US)
Article number38
JournalBiosensors
Volume8
Issue number2
DOIs
StatePublished - Apr 8 2018

Keywords

  • Bone composition
  • Raman spectroscopy
  • Renal osteodystrophy
  • Statistical analysis

ASJC Scopus subject areas

  • Clinical Biochemistry

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